Vulcanizing mold



' Sept. 10, 1929. J. F. ALLEN VULCANIZING MOLD Filed Jan. 17, 1925Patented Sept. 10, 1929.

. UNITED STATES HIMROD ANI) ONE-THIRD T EDW'ARD E, ALLEN, BOTH OF ERIE,`PENNSYLVANIA.

VULCANIZING MOLD.

Application filed January 17, 1925. Serial No. 3,167.

This invention is designed to improve vulcanizing molds, particularlysuch molds as are used for vulcanizing battery boxes. In the vulcanizingof such boxes a core is required which vulcanizes the interior of thebox. Difliculty has been experienced in forming the core sections, wherethere are a plurality of them as is common with battery boxes, so as toretain their shape under heat and to present a surface which can bereadily detached from the rubber after vulcanizetion. Certain moldformsv at the edges of the box have presented diiiiculties ofconstruction particularly where the parts are subjected to thetremendous strains to which these parts are subjected in forcing theplastic material to the diderent parts of the box under the pressure ofthe press. With the present invention, the cores are of suiiicientstrength to retain their shape and adjustable so as to maintain thewalls of the box, the sections being provided with. thimbles giving amaterial more readily detached from the rub ber than materials havingthe desired strength for the bodyy of the core. The present inventionalso obviates the difficulty as to the pattern shapes. Other featuresand details of the invention will appear from the specification andclaims.

The invention is illustrated in the accompanying drawings as followsFig. 1 shows a side elevation of a portion of a press with a core inplace, partly in section.

Fig. 2 a view of a portion of a press at right angles from that shown inFig. 1.

Fig. 3 a section of the core on the line 3--3 in Fig. 1.

Fig. 4 a section on the line 4-4 in Fig. 1.

1 marks the head of the press, 2 the rods extending from the press tothe usual base (not shown), 3 a steam-heated plate secured to the headby screws 3, and 4 the usual dowel pins for assuring the registering ofthe ram 45 (not shown) with the head.

The core is supported on a plate 5. Rods 6 are screwed into the sides ofthe plate 5. These have the heads or Lip-turned ears 7 opposing thefaces of the plate 3 and screws 8 are screwed through the ears againstthe plate of adjustment by means of the screws 8 for the plate 5. f

The core base 9' extendsfrom the plate 5.1

This base has slots 10 forming the `core projections 11. Thimbles 12extend over the proj ections 1.1 and are secured thereon by screws 13extending through the bottom of the thimble into the bottom of theprojection. c

The base 9 with its projectionsll are preferably made of steel and thethimbles are preferably of aluminum or some similar maferial readilydetaching itself fromr the rubber. The interposing of the thimblesbetween the projections 1l make it possible to make the slots 10 wideenough so that they can be readily machined, the space between thethimbles representing thethicknessof the partitions in the battery boxand being rquite narrow.

n It is sometimes desirable to form some pattern around the top edgeofthe box and it is diiiicult to form this pattern on the face plate ofthe mold. wWith the present inventionthis is accomplished by inserting apattern plate 14 between the bottoms of the thimbles and the base plate,the plate 14 being clamped by the thimbles on the plate. `ln the presentinstance the pattern plate has a rib 15 surrounding each coreprojection, thus forming a groove in the top face of the battery y boX.

The present construction forms a very rigid construction which readilysustains the strains to which the core is subjected in putting thematerial under pressure as it is initially formed in the box. It permitsof the use of integral projections of steel witha facing of materialwhich will `readily detach from the rubber at the completion ofvulcani'- Zation and it also permits of the ready adjustment of the coreso as to maintain an equal thickness of walls of the box. j

What I claim as new is 1. In a battery box mold,the combination of acore base plate; core projections formed on the base plate; thimblesarranged over the projections; and a pattern plate clamped between thethimbles and the base plate.

ENT Uceri(n.1.

JOHN F. ALLEN, 0F Earn, PENNSYLVANIA, AssrGNon kor yoms-THIRD@ .LALLIsoN2. In a battery box mold, the combination of a core base p1ate;coreprojections formed on the base'plate; thmbles arranged over theproject-ione; .and a pattern plate clamped be- Y tween the thmbles andthe base plate, said patternV plate-having ypattern ribs surroundingeach projection.

In testimony whereof I have hereunto set my hand.. v

JOHN F. ALLEN.

